diff --git a/cloud-media-livestream/keypublisher/requirements.txt b/cloud-media-livestream/keypublisher/requirements.txt
index fb4f8f9638..ff014987e6 100644
--- a/cloud-media-livestream/keypublisher/requirements.txt
+++ b/cloud-media-livestream/keypublisher/requirements.txt
@@ -2,7 +2,7 @@ Flask==3.1.3; python_version >= '3.9'
 functions-framework==3.9.2
 google-cloud-secret-manager==2.21.1
 lxml==6.1.1
-pycryptodome==3.21.0
+pycryptodome==4.0.0
 pyOpenSSL==26.3.0
 requests==2.34.2; python_version >= '3.10'
 signxml==4.0.4